Hey guys, just got my '99 GT a couple days ago and I'm looking to replace the stereo. I know there are some certain requirements for installing an aftermarket radio with Mach 460, but where I get confused is the fact that the previous owner installed an aftermarket radio himself.
So, does this mean he's already done the hard stuff and I can simply toss on a new wiring harness to my radio and be done? or is there more to it then that. Any help is greatly appreciated.
Just completed the Mach 460 "upgrade" on my 2004 Mustang coupe, The Mach 460 is a strange bird to say the least. You can't just replace the head and expect decent results. Here is what I did:
1) replace the head unit with a modern receiver using the adapter cable that is standard for the Mach 460.
2) lower the rear seats and remove the three 8mm bolts that hold the plastic housing that covers the edge of the rear deck carpet
3) there are two plastic push pins holding the rear carpet piece in place. Remove them.
4) remove the rear speaker carpet and grill covers by lifting in the middle and prying out the left and right edges. It takes some real effort, but it will come out once the ends are pried loose,.
5) locate the six studs sticking up through the rear deck. Someone will need to hold the huge plastic speaker compartment while you remove the six nuts securing the speaker box.
6) remove all the connectors attached to the speaker box.
7) I replaced all four speakers with 6 x 8 three ways.
8) you can reuse the wires going to the left and right front tweeters, but they should be extended to reach the 6 x 8 compartment below and attached to the new 6 x 8 speaker door speakers. Follow the videos available to remove the door panels.
9) new wires will need to be run to the two rear speakers from your head unit,
10) I removed and discarded the awkward speaker box along with the two amplifiers under the rear deck
11) in my application I tapped out the 4 speaker holes for 8-32 screws on the rear deck. The ones closes to the rear windshield were tapped from beneath as there is more space
12) the new speakers are installed from the top using 1/2" 8-32 screws. A very stubby screwdriver is needed for the screws near the rear window.
13) Replace all the removed pieces reversing the process
14) An amplified subwoofer can be added If desired